Question

If x=6 is the only x-intercept of the graph of a quadratic equation, which statement best describes the discriminant of the equation?

A)The discriminant is 0.
B)The discriminant is 6.
C)The discriminant is positive.
D)The discriminant is negative.

Answer 1

Since x is the x-intercepts, that means x'=x" =6 or in other word the discriminante ( Δ = b² 4ac)  =0. Answer is A